The sound comes from Half-Life, Valve's 1998 first-person shooter, where Black Mesa scientists often react fearfully to alien attacks and player-made chaos. Their voice lines became memorable because the game was widely shared, modded and quoted for years. This particular scream still shows up in compilations, source-engine jokes and older PC gaming memes because it conveys instant panic in barely two seconds. It is especially popular in edits that lean on nostalgic game audio or exaggerated danger, much like a FNAF Jumpscare Scream in horror-style meme timing.